Dispensing valve



Aug. 5, 1930. I w. J. WOYWOT DI SPENS ING VALVE Filed Jan. 29, 1921 Patented Au". 5, 1930 UNITED' STATES WALTER J. WOYWOT, OF CHICAGO, ILLINOIS, A SSIGNOR, BY MESNE ASSIGNMENTS, TO

PATENT oFF1cE-' f BOBRICK CHEMICAL CORPORATION, OF LOS ANGELES, CALIFORNIA, A CORPORATION OF DELAWARE DISPENSING, VALVE Application filed January 29, 1921. Serial No. 440,851.

This invention relates to liquid dispensing devices, and pertains particularly to improvements in measuring valves of a type designed to discharge a small measured quantity upon proper operation, and to maintain a suitable closure for the discharge between operations. The immediate use for which the invention is designed is as a dispensing device for llquid soap, suitable for use in conjunction either with an individual container for the liquid, or as an element of a dispensingsystem in which a pipe line is fed from a reservoir, and a plurality of dispensing valves inserted in the pipe line in association respectively with different basins. It is obvious, however, that the invention may be advantageously employed in many other situations.

It has been a universal experience in the use of mechanical devices for dispensing liquid soap that their operability is rendered uncertain by the tendency of the liquid soap to clog moving parts, its tendency to leak out through any possible avenue of escape, and the liability of the devices to rapid wear due to the fact that they are operated very fre quently and with considerable violence. These unfavorable circumstances are aggravated in systems in which a plurality of dispensing devices are fed from a central tank by the fact that with devices heretofore e1n-.

' ployed it has been necessary to maintain a very considerable head of pressure on the tank and pipe line in order to insure the feed of the liquid to the devices. Not only has this increased the tendency of the liquid to leak out of any possible opening, but it has also rendered the operation of such devices somewhat difficult because of the fact that they have to be operated against such hydrostatic pressure.

The general purpose of the present inven tion is to provide a form of dispensing device which normally forms a tight closure for the discharge port, which maybe operated easily, which is not subject-to rapid wear, and which dispenses a measured charge. 3

More particularly stated, one object of the present invention is the provision of adispensingdevi'ce which automatically and positiv'e'l'y charges itself by suction after each peration, thereby obviating the necessity for maintalning a considerable pressure on the supply connections.

Another particular obj is the provision of a mechanism in which a measured charge is cut off from the, supply quantity at each operation of the device, and

ect of the inventionejected, without necessitating the device opcrating against the hydrostatic pressure in the supply line.

Another object of the invention is thepro- I vision of an apparatus in whicha manually operable plunger is effective in the course of its operation to cut off a charge from the supply quantity and eject it through the outlet, then draw in a new charge and close the outlet port. k

A further object of the invention is a provision of an improved construction and disposal of means for cutting 01F a measured charge from the supply quantity of, liquid, the lmproved and novel construction of said means rendering 1t positive and certain in operation at all times and preventing its becoming incapacitated by wear.

Another purpose of the invention is the provision of a construction of dispensing valve especially adapted for the handling'ot' liquid soap or similar gelatinousor gummy substances which are likely to form a deposit on parts of the handling mechanism, the im proved features of such constructionbeing designed to prevent the device beingrendered inoperative by such deposits.

Another purpose of the invention is the provision of a structure having the capabilities above specified which may be'manufactured economically, and which is certain and fool proof sofar as its operation concerned. 7

The invention has other objects which will be pointed out hereinafter, indicatedinlthe appended claims, or willbe obvious from.

the following disclosure inconjunction with; the drawin forming a part of this specifi cation. W ile the present application predicated upon a disclosure of'a single preferred embodiment of the invention, it isto be understood that the same is here presentednot to be regarded as imposing any limitations upon the invention as hereinafter claimed such as would operate to deny it its full and proper scope in the art.

In the drawing Fig. 1 is a longitudinal section the device showingit installed in association with supply means;

' Fig. 2 is a cross-section substantially on ine 2+2 cf F g b nch V Fig- 3 s a d ta l i ust ting he part of the plunger in disassembled relationship.

An understanding of the invention may best be obtained by reference to the illustrativeembodiment in detail. In'the drawing the m l de nate a Suita le cc tsinel' for liquid soap or other material'intended to lee-dispensed, the same acting as a supply source for a supply or distribution line 2 2, in which alsuitable or elbow connection l; arm a m n f a hm n for th i p n ing device. The latter includes primarily a casing which preferably is formed in two V partsyone part being the partition or valve the interior of the connection mem "thread ed boss 16 and carryiiw member 5 and the other the barrel member 6 in. e erm, shamb retl beer- .The P itiea memb r as a n pp e 7 saw r aded f co nec i n w h he. ennect n m mber. nd a bos 8 r w thr aded r conne tion with the barrel member 6. The member 5 as a lelns tul nal bere'd pted t seesaw cate with'the interior of the'barrel 6 d with l and the supply line, which bore reduced within the member 5 to form an inlet port 9 and an associated I valve seat portion 10. The barrelis a tubular member having longinai-b017 3 m s eenvenie t y a C 7 dries-1 forfn arran f r co xia a ig me with the bore of t he partition member An n u ar St p e ber 1 eXtend in bore adjacent the forward end of the b; member and is provided with a cen ral guid; ing aperture. The barrel memo p ovidedyith'an as pe l wininuui atiaaf v and the valve seat 1s eii'ective to nsure aecu rate seating of the valve. Upon inward with the bore 11.

Mounted for longitudinal sliding; move ment in the casing is aplunger made up of the parts illustrated in. disassei'nbled relationship in Fig. 3. These parts include a hollow stem member terminating forward or outer extremity in a] extremity an annular disk 17? Mounte this hollow stem isasleevemember l8liaving he a s 1%2- Statues ass a 11 the sleeve niein si-"1s, i1e-2 1nmea between thehead member 19., and-disk 17, are" n pansible" washers cup washer see v V ber' spa'cei er hber mien piston washer 22. The diameters of ers are such that they" will make? 1 contact. with the wall of th e memes ste l to a l a i s. ner,

0', which is "meant" a accommodated bl the rod' in the stem y esses r t the a ta zfi 'qsiekly a it will be niaint ued out of contact with the wall of the here. The plunger is guided for movement inv the bore by the contact between the washers and the wall thereof, and by the fit of the stem member 15 in the center opening of the stop l2. The l'iead men bcr 19, washer 20 and spacer 21 are apertured to provide a discharge chamiel 253 through which communication may be established between the discharge port 14 and the bore behind the plunger, and the head member lQ'and washer 20 may be provided with zn'ixiliary channels 23 adapted to register with the channel in the spacer, so as to permit tightening of the washer. Packing; compressed between the stop member and a packing nut 25 is effective to maintai ya water-tightbearing about the stem 15. A suitable head or button 26 is 'mountedupon the'bosslfi. Slidably mounted in the sleeve 18 is a rod 27' carrying at its inner extremity a valve member 28 adapted for cooperation with the valve seat 10 .to control the inlet port 9, A

spring 29 cooperates with the sleeve 18 and the valve 28 to tend t-o 'm ove the rod rearwardly in the sleeve, such movement being d limited by a head 30 upset the forty; end of the rod; while movement of the rod forwardly within the stem 15 is accoinmo dated by the bore 01' the latter. Encompass.

position, the outlet portl l is closed by the ted from washer 20 and the valve 2S is'uusea p the seat 10, permitting access of fluid from the supply line to thebore ll. W ththe parts in thisposition the valve 28 housed witl' in" V the larger portion of the bore the p; I

tron member 5 whichfunctions as a ccnte up,

guide in the assembling; of e device and, to gether with the conical form of the valve movement of the plunger, which may be ettected by pressure exerted against thebut ton 26, thefvalve 28 is advanced to. the point where it will close the port 9, thus cutting the liquid within the bore ll from thatin the supply line. Approximately at the time the pa t9 is t us c d-i e mm eieatic b weee the discharge channel 23 and the outlet port 14 is established, so that continued f id movement of the plunger wil etlec ect h e idrem the b re 1 t the channel and t e or 1 *S 'z e Wa Jere the plungeriafter he valve l a i he forward movement of 51 9 rel ase of he plungerwill' sea-e1 a influence of springs 27 and 32, and finally under the influence of spring 32 alone. In the course of such outward or restoring movement of the plunger, it is obvious that valve 28 will be removed from its seat 10 before the outward movement of the pin. is completed, thus re-estahiishing communication between the bore of the barrel and the supply conduit. Due to the cooperation of the piston washer 22 with the wall of the bore, this outward movement of the plunger will be effective to draw a charge of liquid through the inlet port 9 into the bore 11, where itremains until the next inward movement of the plunger, by which it is ejected as above described.

Certain detail features of the construction are of importance in securing this operation. One of such features is the use of the expansible washer 20 which being of cup form, maintains anintimate but flexible cooperation with the wall of the bore, thus preventing the leakage of liquid about it, due to the tendency of the pressure of the liquid in the bore to expand the washer, and also preventing the jamming ofthe plunger by a deposit of viscous material on the wall of the chamber at the margin of the washer. The form of the we sher tends to prevent such a deposit moreover, as such deposits form most readily in re-entrant crevices, none of which are formed by the cooperation of the washer with the wall of the bore. Another important detail resides in the fact that there are liberal clearances between all relatively movable metal parts, such as the periphery of the spacer 21 and the bore, thus preventing the clogging of the plunger by small deposits between such surfaces. The washer 22 prevents leakage of liquid in front of the spacer 21. and wipes the surface of the bore upon each operation of the plunger. The seating of the valve 28 upon the seat 10 relieves the plunger from the hydrostatic pressure of the liquid in the supply line and the reservoir, so that its inward movement may be effected without having to lift the column of liquid. The cooperation of the valve 28 and seat 10 provides a stationary closure of substantial area, thus eliminating wear on the valve and the valve seat.

Itwill be obvious from the foregoing that quickly they say follow each other, and that 7 it may be readily dismounted and disassembled for the purpose of cleaning or repair.

I claim:

l. A dispensing device comprising a chambered body provided with an iinlet and an outlet port, a piston in said 'bodymovable relatively to both of said ports andadapted to normally close one of them,.- said piston having two longitudinal channels extending inward fromthe face of the piston,'a valve member carried slidably in one of said channels and adapted to close. the other of said ports, the other channel forming unrestricted communicationbetween the chambered body ad outlet port. on inward movement of said piston. i l I 4 A dispensing device comprising a chambered body provided with an inlet and an outlet port, a piston in said body movable relatively to both of said ports, said piston ing pressure means for urging the piston to the outlet port closing position, and separate yielding pressure means for urging the valve towards the inlet port. I

3. A dispensing device comprising a chambered body provided with an inlet and an outletport, a piston in said body movable relative to both of said ports and adapted to maintain said outlet port closed during a predetermined inward movement thereof, and a valve operable by said piston for closing said inlet port, said piston having an unrestricted out-let channel opening in the face of said piston adapted to afford free communication between the chambered body and said outlet port upon movement of said piston to close said inlet port.

4. In a liquid dispensing device the combination of a body having a uniform axial bore and inlet and outlet ports communicating with said bore, a plunger movable within said bore between said ports, a valve operable by said plunger for closing said inlet port, a liquid dispensing piston carried by said plunger having sliding contact with the wall of said bore across said outlet port to maintain said outlet port closed during movement of the plunger to close said inlet port.

5. In a liquid dispensing device, the combination of a body having a uniform axial bore and inlet and outlet ports communicating with said bore, a plunger movable within the bore of the body between said ports, a circumferentially expansible washer carried by said plunger having sliding contact with the wall of said bore across said Qu let pant to prqxzide a piston and also. a valve for saidu letport. V

4.6 In a l qui d dspensing device the 00111 inatipnbf a chambered body having a unif-Qrm axial bare. and inlet apd outlet parts comm nicating with said bore, aplunger movable within said bore between said ports, t liquid dispensing piston carried by said Plunger having slidingcentact with the Wall of said, here across said outlet port to mainsaid Outlet port closed during a.predetermined outward movement of said piston, aid pistqn beirgg reduced between its ends to provide enannula-r space adjacent the. chamher Well adapted to communicate With'the outlet poet: duriqg a plzedetermined inlet mbvenlent Qfthe pisten, there being a chanel hfi-Qu'g the piston vhead forming comn uniea ibnbetweep the chambered body and w, the angular space abound. the piston.

In test-immy whereof I have hel eunto signed my name, 7

1 WALTER J. WOYWOT. 

